Abstract: In order to investigate the effects of different filter parameters on deliveries of Pb, As and Cd in mainstream smoke, the Pb, As and Cd in the mainstream smoke of cigarettes wrapped with filters of different specifications were determined. The results indicated that: (1)Effects of different types of filters on deliveries of Pb, As, Cd in mainstream smoke had certain selectivity. (2)With the increase of the length of the filter, the Pb, As and Cd in mainstream smoke had different decrease. (3)The deliveries of Pb, As and Cd were affected by filter pressure drop and the air permeability of both tipping paper and plug wrapper to a certain extent, however the influence of filter pressure drop and the air permeability of tipping paper was more obvious.